BENEFITS:
Energy cost savings. The airtight construction of double glazed windows creates thermal insulation. This reduces the flow of incoming and outgoing heat. Less energy is used to heat up or cool down the space, resulting in lower energy bills.

Limited condensation. Moisture on a warm surface forms droplets of water, which freezes into frost.
This can make the room feel colder, which forces the people inside to adjust the heat. The air between the two panes of glass, plus the airtight seal, prevents condensation from building up by blocking moisture in cold weather.
Sound insulation. Double glazed windows improve sound insulation by creating a barrier between the home and the environment outside.

Safety. Double glazed windows are tougher to break than single pane windows, so they increase the security of the home. Because they’re sealed tighter than other windows, it is also difficult to force them open from the outside.
Reduce damage to furnishings. Double glazed windows can reduce the amount of sun and heat entering the room. This can help reduce sun damage to your paintings, furniture, carpet, and other objects around the home.